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Finding the Fourth Proportional to 253,968.40, 381,028.74 and 76,481.20

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Solution

The fourth proportional to 253,968.40, 381,028.74 and 76,481.20 is: 114,744.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,968.40 : 381,028.74 = 76,481.20 : x
  2. Step 2: Convert to fraction form
    253,968.40/381,028.74 = 76,481.20/x
  3. Step 3: Cross multiply
    253,968.40x = 381,028.74 × 76,481.20
  4. Step 4: Simplify right side
    253,968.40x = 29,141,535,269.69
  5. Step 5: Solve for x
    x = 29,141,535,269.69/253,968.40
  6. Step 6: Final answer
    x = 114,744.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.